This population is not known to be hunted presently but is likely to have been hunted at least opportunistically in the past. Entanglements of humpback dolphins in gillnets have been recorded in coastal waters of the
Habitat Degradation and Reduction
Reduction of freshwater flow and other kinds of degradation of estuaries and adjacent coastal waters (e.g. land reclamation) are almost certainly having an impact on this dolphin population, and there are continuing proposals for large-scale industrial development projects involving land reclamation (e.g., offshore wind farms, steel factory of the Formosa Plastic Group, Chinese Petroleum Company’s petrochemical factory within the animals’ restricted habitat) (Wang et al. 2004b, 2007b). Besides the physical removal of habitat, activities associated with land reclamation, such as pile-driving, can cause disturbance or even direct harm to the dolphins.
Pollution (industrial, agricultural and residential discharge with minimal to no treatment) poses a risk to humpback dolphins via the consumption of marine prey species (Clarke et al. 2000, Parsons 2004). Spills of oil and other toxic substances by commercial ships could be catastrophic for a population so small and limited in its distribution.
Parsons (1997) estimated that a humpback dolphin in
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